JEE Advanced 2020 Full Test 1 Paper 1

Two identical ring of equal mass 'm' and radius 'R' rigidly attached wears a bead of mass 'm'. Bead can freely slide without friction. It is hinged at point ' P ' in such a way that it can freely rotates about horizontal axis passing through point 'P'. The ring and bead are released from rest from give position. Then, just after release